29... d8e7 [%c_effect e7;square;e7;type;Mistake;persistent;true] This is the losing move. 30. b3b4 [%c_effect b4;square;b4;type;GreatFind;persistent;true] With this and the next surprising moves, White seals the game in impressive fashion. 30... f7f5 [%c_effect f5;square;f5;type;Inaccuracy;persistent;true] 31. e4c5 [%c_effect c5;square;c5;type;GreatFind;persistent;true] 31... e7c5 